Patent Number: 6,251,244

Title: Electrochemical measuring cell for detecting hydride gases

Abstract: The invention is directed to an electrochemical measuring cell for detecting hydride gases, preferably arsine and phosphine. The measuring cell includes at least one working electrode (3) made of a catalytically inactive material and a reference electrode (4) in an electrolyte chamber (6) filled with an electrolyte containing sulphuric acid. The measuring cell is improved as to the cross sensitivity with respect to other toxic gases. The working electrode is configured as a carbon electrode (3) and an electrolyte additive of silver sulphate is provided in saturated solution in the electrode (9).

Inventors: Kiesele; Herbert (Lubeck, DE), Mett; Frank (Lubeck, DE)

Assignee: Drager Sicherheitstechnik GmbH

International Classification: G01N 27/49 (20060101); G01N 027/404 ()

Expiration Date: 06/26/2018